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1. The nylon balloon for xenon loaded liquid scintillator in KamLAND-Zen 800 neutrinoless double-beta decay search experiment

Author

collaboration, KamLAND-Zen, Gando, Y., Gando, A., Hachiya, T., Hayashida, S., Hosokawa, K., Ikeda, H., Mitsui, T., Nakada, T., Obara, S., Ozaki, H., Shirai, J., Ueshima, K., Watanabe, H., Abe, S., Hata, K., Hayashi, A., Honda, Y., Ieki, S., Inoue, K., Ishidoshiro, K., Ishikawa, S., Kamei, Y., Kamizawa, K., Karino, Y., Kawada, N., Kinoshita, T., Koga, M., Matsuda, S., Miyake, H., Nakamura, K., Nemoto, K., Ono, A., Ota, N., Otsuka, S., Shibukawa, Y., Shimizu, I., Shirahata, Y., Soma, K., Suzuki, A., Suzuki, A. A., Takai, T., Takeuchi, A., Tamae, K., Teraoka, Y., Wada, Y., Chernyak, D., Kozlov, A., Yoshida, S., Umehara, S., Takemoto, Y., Fushimi, K., Hirata, S., Grant, C., Li, A., Learned, J. G., Maricic, J., Berger, B. E., Fujikawa, B. K., Fraker, S., Herman, A., Krupczak, E., Pease, G. L., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., O'Donnell, T., Dell'Oro, S., Detwiler, J. A., Enomoto, S., and Decowski, M. P.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The KamLAND-Zen 800 experiment is searching for the neutrinoless double-beta decay of $^{136}$Xe by using $^{136}$Xe-loaded liquid scintillator. The liquid scintillator is enclosed inside a balloon made of thin, transparent, low-radioactivity film that we call Inner Balloon (IB). The IB, apart from guaranteeing the liquid containment, also allows to minimize the background from cosmogenic muon-spallation products and $^{8}$B solar neutrinos. Indeed these events could contribute to the total counts in the region of interest around the Q-value of the double-beta decay of $^{136}$Xe. In this paper, we present an overview of the IB and describe the various steps of its commissioning minimizing the radioactive contaminations, from the material selection, to the fabrication of the balloon and its installation inside the KamLAND detector. Finally, we show the impact of the IB on the KamLAND background as measured by the KamLAND detector itself., Comment: 23 pages, 16 figures, to be submitted to JINST

Published
2021
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2. The nylon balloon for xenon loaded liquid scintillator in KamLAND-Zen 800 neutrinoless double-beta decay search experiment

Author

Gando, Y, Gando, A, Hachiya, T, Hayashida, S, Hosokawa, K, Ikeda, H, Mitsui, T, Nakada, T, Obara, S, Ozaki, H, Shirai, J, Ueshima, K, Watanabe, H, Abe, S, Hata, K, Hayashi, A, Honda, Y, Ieki, S, Inoue, K, Ishidoshiro, K, Ishikawa, S, Kamei, Y, Kamizawa, K, Karino, Y, Kawada, N, Kinoshita, T, Koga, M, Matsuda, S, Miyake, H, Nakamura, K, Nemoto, K, Ono, A, Ota, N, Otsuka, S, Shibukawa, Y, Shimizu, I, Shirahata, Y, Soma, K, Suzuki, A, Suzuki, AA, Takai, T, Takeuchi, A, Tamae, K, Teraoka, Y, Wada, Y, Chernyak, D, Kozlov, A, Yoshida, S, Umehara, S, Takemoto, Y, Fushimi, K, Hirata, S, Grant, C, Li, A, Learned, JG, Maricic, J, Berger, BE, Fujikawa, BK, Fraker, S, Herman, A, Krupczak, E, Pease, GL, Winslow, LA, Efremenko, Y, Karwowski, HJ, Markoff, DM, Tornow, W, O'Donnell, T, Dell'Oro, S, Detwiler, JA, Enomoto, S, and Decowski, MP

Subjects
Double-beta decay detectors, Large detector systems for particle and astroparticle physics, Liquid detectors, Physical Sciences, Engineering, Nuclear & Particles Physics
Abstract

The KamLAND-Zen 800 experiment is searching for the neutrinoless double-beta decay of 136Xe by using 136Xe-loaded liquid scintillator. The liquid scintillator is enclosed inside a balloon made of thin, transparent, low-radioactivity film that we call Inner Balloon (IB). The IB, apart from guaranteeing the liquid containment, also allows to minimize the background from cosmogenic muon-spallation products and 8B solar neutrinos. Indeed these events could contribute to the total counts in the region of interest around the Q-value of the double-beta decay of 136Xe. In this paper, we present an overview of the IB and describe the various steps of its commissioning minimizing the radioactive contaminations, from the material selection, to the fabrication of the balloon and its installation inside the KamLAND detector. Finally, we show the impact of the IB on the KamLAND background as measured by the KamLAND detector itself.

Published
2021

3. Erratum: “A Search for Electron Antineutrinos Associated with Gravitational-wave Events GW150914 and GW151226 Using KamLAND” (2016, ApJL, 829, L34)

Author

Gando, A, Gando, Y, Hachiya, T, Hayashi, A, Hayashida, S, Ikeda, H, Inoue, K, Ishidoshiro, K, Karino, Y, Koga, M, Matsuda, S, Mitsui, T, Nakamura, K, Obara, S, Oura, T, Ozaki, H, Shimizu, I, Shirahata, Y, Shirai, J, Suzuki, A, Takai, T, Tamae, K, Teraoka, Y, Ueshima, K, Watanabe, H, Kozlov, A, Takemoto, Y, Yoshida, S, Fushimi, K, Piepke, A, Banks, TI, Berger, BE, Fujikawa, BK, O’Donnell, T, Learned, JG, Maricic, J, Sakai, M, Winslow, LA, Krupczak, E, Ouellet, J, Efremenko, Y, Karwowski, HJ, Markoff, DM, Tornow, W, Detwiler, JA, Enomoto, S, and Decowski, MP

Subjects
Particle and High Energy Physics, Physical Sciences, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Space sciences
Published
2017

4. A Search for Electron Antineutrinos Associated with Gravitational-wave Events GW150914 and GW151226 Using KamLAND (vol 829, L34, 2016)

Author

Gando, A, Gando, Y, Hachiya, T, Hayashi, A, Hayashida, S, Ikeda, H, Inoue, K, Ishidoshiro, K, Karino, Y, Koga, M, Matsuda, S, Mitsui, T, Nakamura, K, Obara, S, Oura, T, Ozaki, H, Shimizu, I, Shirahata, Y, Shirai, J, Suzuki, A, Takai, T, Tamae, K, Teraoka, Y, Ueshima, K, Watanabe, H, Kozlov, A, Takemoto, Y, Yoshida, S, Fushimi, K, Piepke, A, Banks, TI, Berger, BE, Fujikawa, BK, O'Donnell, T, Learned, JG, Maricic, J, Sakai, M, Winslow, LA, Krupczak, E, Ouellet, J, Efremenko, Y, Karwowski, HJ, Markoff, DM, Tornow, W, Detwiler, JA, Enomoto, S, Decowski, MP, and Collaboration, KamLAND

Subjects
Astronomy & Astrophysics, Astronomical and Space Sciences
Published
2017

5. Search for electron antineutrinos associated with gravitational wave events GW150914 and GW151226 using KamLAND

Author

KamLAND Collaboration, Gando, A., Gando, Y., Hachiya, T., Hayashi, A., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Karino, Y., Koga, M., Matsuda, S., Mitsui, T., Nakamura, K., Obara, S., Oura, T., Ozaki, H., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Takai, T., Tamae, K., Teraoka, Y., Ueshima, K., Watanabe, H., Kozolov, A., Takemoto, Y., Yoshida, S., Fushimi, K., Piepke, A., Banks, T. I., Berger, B. E., Fujikawa, B. K., O'Donnell, T., Learned, J. G., Maricic, J., Sakai, M., Winslow, L. A., Krupczak, E., Ouellet, J., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, Nuclear Experiment
Abstract

We present a search for low energy antineutrino events coincident with the gravitational wave events GW150914 and GW151226, and the candidate event LVT151012 using KamLAND, a kiloton-scale antineutrino detector. We find no inverse beta-decay neutrino events within $\pm 500$ seconds of either gravitational wave signal. This non-detection is used to constrain the electron antineutrino fluence and the luminosity of the astrophysical sources., Comment: 11 pages, 4 figures, as published in ApJL. Updated to replace power law spectrum with Fermi Dirac spectrum

Published
2016
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6. A SEARCH FOR ELECTRON ANTINEUTRINOS ASSOCIATED WITH GRAVITATIONAL-WAVE EVENTS GW150914 AND GW151226 USING KAMLAND

Author

Gando, A, Gando, Y, Hachiya, T, Hayashi, A, Hayashida, S, Ikeda, H, Inoue, K, Ishidoshiro, K, Karino, Y, Koga, M, Matsuda, S, Mitsui, T, Nakamura, K, Obara, S, Oura, T, Ozaki, H, Shimizu, I, Shirahata, Y, Shirai, J, Suzuki, A, Takai, T, Tamae, K, Teraoka, Y, Ueshima, K, Watanabe, H, Kozlov, A, Takemoto, Y, Yoshida, S, Fushimi, K, Piepke, A, Banks, TI, Berger, BE, Fujikawa, BK, O’Donnell, T, Learned, JG, Maricic, J, Sakai, M, Winslow, LA, Krupczak, E, Ouellet, J, Efremenko, Y, Karwowski, HJ, Markoff, DM, Tornow, W, Detwiler, JA, Enomoto, S, and Decowski, MP

Subjects
gravitational waves, neutrinos, astro-ph.HE, hep-ex, nucl-ex, Astronomical and Space Sciences, Astronomy & Astrophysics
Abstract

We present a search, using KamLAND, a kiloton-scale anti-neutrino detector, for low-energy anti-neutrino events that were coincident with the gravitational-wave (GW) events GW150914 and GW151226, and the candidate event LVT151012. We find no inverse beta-decay neutrino events within ±500 s of either GW signal. This non-detection is used to constrain the electron anti-neutrino fluence and the total integrated luminosity of the astrophysical sources.

Published
2016

7. Publisher’s Note: Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen [Phys. Rev. Lett. 117, 082503 (2016)]

Author

Gando, A, Gando, Y, Hachiya, T, Hayashi, A, Hayashida, S, Ikeda, H, Inoue, K, Ishidoshiro, K, Karino, Y, Koga, M, Matsuda, S, Mitsui, T, Nakamura, K, Obara, S, Oura, T, Ozaki, H, Shimizu, I, Shirahata, Y, Shirai, J, Suzuki, A, Takai, T, Tamae, K, Teraoka, Y, Ueshima, K, Watanabe, H, Kozlov, A, Takemoto, Y, Yoshida, S, Fushimi, K, Banks, TI, Berger, BE, Fujikawa, BK, O'Donnell, T, Winslow, LA, Efremenko, Y, Karwowski, HJ, Markoff, DM, Tornow, W, Detwiler, JA, Enomoto, S, and Decowski, MP

Subjects
Particle and High Energy Physics, Physical Sciences, KamLAND-Zen Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

This corrects the article DOI: 10.1103/PhysRevLett.117.082503.

Published
2016

8. Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen

Author

Gando, A, Gando, Y, Hachiya, T, Hayashi, A, Hayashida, S, Ikeda, H, Inoue, K, Ishidoshiro, K, Karino, Y, Koga, M, Matsuda, S, Mitsui, T, Nakamura, K, Obara, S, Oura, T, Ozaki, H, Shimizu, I, Shirahata, Y, Shirai, J, Suzuki, A, Takai, T, Tamae, K, Teraoka, Y, Ueshima, K, Watanabe, H, Kozlov, A, Takemoto, Y, Yoshida, S, Fushimi, K, Banks, TI, Berger, BE, Fujikawa, BK, O'Donnell, T, Winslow, LA, Efremenko, Y, Karwowski, HJ, Markoff, DM, Tornow, W, Detwiler, JA, Enomoto, S, and Decowski, MP

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, KamLAND-Zen Collaboration, hep-ex, nucl-ex, physics.ins-det, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

We present an improved search for neutrinoless double-beta (0νββ) decay of ^{136}Xe in the KamLAND-Zen experiment. Owing to purification of the xenon-loaded liquid scintillator, we achieved a significant reduction of the ^{110m}Ag contaminant identified in previous searches. Combining the results from the first and second phase, we obtain a lower limit for the 0νββ decay half-life of T_{1/2}^{0ν}>1.07×10^{26}  yr at 90% C.L., an almost sixfold improvement over previous limits. Using commonly adopted nuclear matrix element calculations, the corresponding upper limits on the effective Majorana neutrino mass are in the range 61-165 meV. For the most optimistic nuclear matrix elements, this limit reaches the bottom of the quasidegenerate neutrino mass region.

Published
2016

16. Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen

Author

Massachusetts Institute of Technology. Department of Physics, Winslow, Lindley, Gando, A., Gando, Y., Hachiya, T., Hayashi, A., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Karino, Y., Koga, M., Matsuda, S., Mitsui, T., Nakamura, K., Obara, S., Oura, T., Ozaki, H., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Takai, T., Tamae, K., Teraoka, Y., Ueshima, K., Watanabe, H., Kozlov, A., Takemoto, Y., Yoshida, S., Fushimi, K., Banks, T. I., Berger, B. E., Fujikawa, B. K., O’Donnell, T., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., Decowski, M. P., Massachusetts Institute of Technology. Department of Physics, Winslow, Lindley, Gando, A., Gando, Y., Hachiya, T., Hayashi, A., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Karino, Y., Koga, M., Matsuda, S., Mitsui, T., Nakamura, K., Obara, S., Oura, T., Ozaki, H., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Takai, T., Tamae, K., Teraoka, Y., Ueshima, K., Watanabe, H., Kozlov, A., Takemoto, Y., Yoshida, S., Fushimi, K., Banks, T. I., Berger, B. E., Fujikawa, B. K., O’Donnell, T., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.

Abstract

United States. Department of Energy (DE-AC02-05CH11231)

Published
2017

17. CERTAIN-1: efficacy and safety of glecaprevir/pibrentasvir in Japanese patients with chronic genotype 1 hepatitis C virus infection with and without cirrhosis

Author

Chayama, K., primary, Suzuki, F., additional, Karino, Y., additional, Kawakami, Y., additional, Sato, K., additional, Atarashi, T., additional, Naganuma, A., additional, Watanabe, T., additional, Eguchi, Y., additional, Yoshiji, H., additional, Seike, M., additional, Takei, Y., additional, Kato, K., additional, Alves, K., additional, Burroughs, M., additional, Redman, R., additional, Pugatch, D.L., additional, Pilot-Matias, T., additional, Xie, W., additional, and Kumada, H., additional

Published
2017
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25. G13 : Ombitasvir/paritaprevir/ritonavir for treatment of HCV genotype 1b in Japanese patients with or without cirrhosis: Results from gift-I

Author

Chayama, K., primary, Suzuki, F., additional, Ikeda, K., additional, Toyoda, H., additional, Sato, K., additional, Karino, Y., additional, Matsuzaki, Y., additional, Kioka, K., additional, Pilot-Matias, T., additional, Setze, C., additional, Zhang, X., additional, Badri, P., additional, Yanke, T., additional, Matsuda, T., additional, Vilchez, R.A., additional, Rodrigues-Jr, L., additional, and Kumada, H., additional

Published
2015
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26. Noninvasive Reactor Imaging Using Cosmic-Ray Muons

Author

Miyadera, H., primary, Fujita, K., additional, Karino, Y., additional, Kume, N., additional, Nakayama, K., additional, Sano, Y., additional, Sugita, T., additional, Yoshioka, K., additional, Morris, C. L., additional, Bacon, J. D., additional, Borozdin, K. N., additional, Perry, J. O., additional, Mizokami, S., additional, Otsuka, Y., additional, and Yamada, D., additional

Published
2014
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27. P1216 EFFICACY AND SAFETY OF SIMEPREVIR PLUS PEG-INTERFERON/RIBAVIRIN THERAPY IN PATIENTS WITH HCV GENOTYPE 1 – COMPARISON WITH TELAPREVIR PLUS PEG-INTERFERON/RIBAVIRIN THERAPY AND PEG-INTERFERON/RIBAVIRIN THERAPY

Author

Nakajima, T., primary, Kimura, M., additional, Arakawa, T., additional, Kuwata, Y., additional, Ozeki, I., additional, Sato, T., additional, Ohmura, T., additional, Hige, S., additional, Karino, Y., additional, and Toyota, J., additional

Published
2014
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34. Virological response and safety of 24‐week telaprevir alone in Japanese patients infected with hepatitis C virus subtype 1b

Author

Toyota, J., primary, Ozeki, I., additional, Karino, Y., additional, Asahina, Y., additional, Izumi, N., additional, Takahashi, S., additional, Kawakami, Y., additional, Chayama, K., additional, Kamiya, N., additional, Aoki, K., additional, Yamada, I., additional, Suzuki, Y., additional, Suzuki, F., additional, and Kumada, H., additional

Published
2012
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35. 14 DUAL ORAL THERAPY WITH THE NS5A INHIBITOR DACLATASVIR (BMS-790052) AND NS3 PROTEASE INHIBITOR ASUNAPREVIR (BMS-650032) IN HCV GENOTYPE 1B-INFECTED NULL RESPONDERS OR INELIGIBLE/INTOLERANT TO PEGINTERFERON/RIBAVIRIN

Author

Suzuki, F., primary, Ikeda, K., additional, Toyota, J., additional, Karino, Y., additional, Ohmura, T., additional, Chayama, K., additional, Takahashi, S., additional, Kawakami, Y., additional, Ishikawa, H., additional, Watanabe, H., additional, Hu, W., additional, McPhee, F., additional, Hughes, E., additional, and Kumada, H., additional

Published
2012
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